Examples · Oral dose - tablets
Worked example
Oral dose - tablets - practice problem 4
The prescriber orders 0.5 mg of digoxin PO. The pharmacy stocks digoxin in 0.25 mg tablets.
Ordered dose0.5 mg
On hand0.25 mg per tablet
How many tablets should the nurse give?
Answer: 2 tablets
Step-by-step solution
1. Identify what you have and what you want
Have: 0.25 mg per tablet · Want: 0.5 mg
2. Set up dimensional analysis so mg cancels
0.5 mg × ( 1 tablet ÷ 0.25 mg )
3. Cancel mg and solve
= ( 0.5 × 1 ) ÷ 0.25 tablet
= 2 tablets
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